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Beware that the bio fuel replacement for ordinary domestic heating oil has given some people trouble with growth of bugs in it, causing sludge and blockages. Considering that Britain as a whole contributes less than 1% to global carbon dioxide emissions, even if all users of heating oil...

The one at the top probably (the bleed screw unit) needs a new rubber O-ring. Again, turn off both valves feeding the towel rail, drain enough water out to get it below the top leak, then unscrew the unit, put on a new O-ring and screw it back in.

Even if it's a small leak, it's worth trying to find it and repairing it. Even a small leak will require new water to be continually added to the CH circuit, introducing new oxygen and diluting the inhibitor. So corrosion within the system will be increased.

This seems to be a downside of combi boilers that heat domestic HW solely on demand. I think this means (though I guess you could design a boiler with 2 separate heat exchangers) that there can't be total separation of the DHW and CH water circuits and, instead, a valve has to be used to direct...

I suspect the old valve had its fill tube dipped below the water surface in the tank. This is now not permitted because of the risk of backflow, so the new valve will just drop water from the valve onto the surface of the water and that's the noise you can hear.

Yup...in my opinion combi boilers that only heat water as you call for it have serious drawbacks which are often not made clear by boiler fitters who present them as the "modern" replacement for systems with HW cylinders. It's true of course that a HW cylinder continuously loses some heat which...

You can also get an Oil Lifter which is a suction pump and header tank combined which can be fixed above the boiler to provide a gravity feed, and which is able to draw oil from an oil tank which is below the boiler and even a significant distance from it horizontally. Just google "oil lifter"...

If the HW temperature is set to 60C try raising it to 70C to see if this makes the HW more acceptable to you. 60c is the generally accepted minimum temp to kill legionnaires disease bacteria, so I guess that's why your installer set it at that. You may find 70C too hot and at risk of scalding...

People converting to heat pumps from gas or oil boilers have been paying up to £20k if they need new radiators and piping. These are often necessary because the flow temperature from a heat pump is much lower than that from a gas or oil boiler, so the radiators need to be bigger to give out heat...

Whatever the merits and de-merits of heat pumps, don't expect that changing to one from you boiler will improve your EPC rating. Because EPCs are currently based mainly on cost of the energy supply to a house, using a heat source that relies on electricity is seen by the EPC system as a bad...

Glad you were able to fix your problem. Not sure I like being referred to as a "comrade" though...

If she'd paid by credit card she could easily use the chargeback process. However, BACs directly moves funds from her bank account into the dodgy plumber's account, so there's no easy way, short of the small claims court, of getting back her money

Well, I've fitted several heating coils into HW cylinders this way so I'm certainly not wrong. I don't intend to reply to any more of your rather rude comments.

Yes, very annoying - but it's rather too common these days for tradesmen to do the quickest job they can get away with and not think through the consequences of what they are doing. But the angle to which you can lift the EP2 does look sufficient to unhook it from the top. Maybe apply a little...

If the thermostat is not in not contact with the wall of the cylinder, it will be calling for heat even when the water in the cylinder is at the desired temperature, because the thermostat will not "see" that temperature.

I have changed the fused connection unit supplying my oil boiler to a double pole switched socket and ordinary 13 amp plug. When I suffered a 3 day power outage after the January storm it was simple matter to unplug the boiler feed plug from the socket and plug it into my generator - which I had...

I'm afraid there's a lot of nonsense hear but I really can't be bothered to go through this lengthy post and comment on it all.

Operating the system for any length of time with CH circuit water continually escaping into your HW system will mean that the CH heating circuit is continually being topped up with fresh, oxygenated water via the CH header tank. This will not only dilute any inhibitor in the CH system but also...

I can assure you that copper WILL dissolve in both nitric and sulphuric acids. I accept that it won't dissolve in hydrochloric acid but iron and steel will and since CH systems have both metals in them, I wouldn't put any of the 3 acids into a CH system. And yes, acetic acid does react with...

Well, if there are no leaks from the radiator and nothing has been spilled on it, and the smell only occurs when the radiator is hot, it must be the paint or coating on the radiator that is smelling. It can't be anything else. Is the radiator new or have you recently painted it?